[Feature Request] Reply to messages

[NicolasDerumigny]

Reactions are nice, but it would be great to have a way to reply by quoting original matched user message, as well as an example illustrating it.

[HarHarLinks]

there isn't an example, but you can easily send replies by just following the spec of a reply. You can generate an example by sending what you want in a client and then inspecting the message json. E.g. this is a very generic template for a media event that is a reply at the same time.

    replymedia:
        type: m.room.message
        variables:
            react_to_event: '{{event.content.get_reply_to() or event.event_id}}'
        content:
            msgtype: $${type}
            body: $${description}
            url: $${media}
            info:
                mimetype: $${mime}
                w: $${width}
                h: $${height}}
                size: $${size}
            m.relates_to:
                rel_type: m.reply
                m.in_reply_to:
                    event_id: $${react_to_event}

[spaetz]

Possible,
here are my templates for both plaintext replies and markdown replies. Perhaps it would make sense to add those to the sample docs somewhere. (apologies if my reply is too close to the previous one, which provides an excellent and a bit more generic template.

    plaintext_reply:
        type: m.room.message
        variables:
            react_to_event: '{{event.content.get_reply_to() or event.event_id}}'
        content:
            m.relates_to:
                m.in_reply_to:
                    event_id: $${react_to_event}
            msgtype: m.text
            body: $${message}
    md_reply:
        type: m.room.message
        variables:
            react_to_event: '{{event.content.get_reply_to() or event.event_id}}'
        content:
            m.relates_to:
                m.in_reply_to:
                    event_id: $${react_to_event}
            msgtype: m.text
            body: $${message}
            format: org.matrix.custom.html
            formatted_body: $${formatted_body}

[HarHarLinks]

I am currently using these 4 templates:

    reply:
        type: m.room.message
        variables:
            react_to_event: '{{event.content.get_edit() or event.event_id}}'
        content:
            msgtype: $${type}
            body: $${body}
            m.relates_to:
                rel_type: m.reply
                m.in_reply_to:
                    event_id: $${react_to_event}

    replyhtml:
        type: m.room.message
        variables:
            react_to_event: '{{event.content.get_edit() or event.event_id}}'
        content:
            msgtype: $${type}
            body: $${body}
            format: org.matrix.custom.html
            formatted_body: $${formattedbody}
            m.relates_to:
                rel_type: m.reply
                m.in_reply_to:
                    event_id: $${react_to_event}

    replymedia:
        type: m.room.message
        variables:
            react_to_event: '{{event.content.get_edit() or event.event_id}}'
        content:
            msgtype: $${type}
            body: $${description}
            url: $${media}
            info:
                mimetype: $${mime}
                w: $${width}
                h: $${height}
                size: $${size}
            m.relates_to:
                rel_type: m.reply
                m.in_reply_to:
                    event_id: $${react_to_event}

    replysticker:
        type: m.sticker
        variables:
            react_to_event: '{{event.content.get_edit() or event.event_id}}'
        content:
            url: $${sticker}
            info:
                w: $${width}
                h: $${height}
                size: $${size}
                mimetype: $${mime}
            body: $${description}
            m.relates_to:
                rel_type: m.reply
                m.in_reply_to:
                    event_id: $${react_to_event}

I suppose with some jinja magic that detects what values are set and switches based on that it might even be possible to merge them.

Please note especially that I have changed

- react_to_event: '{{event.content.get_reply_to() or event.event_id}}'
+ react_to_event: '{{event.content.get_edit() or event.event_id}}'

The old version is based on the current templates, but in case the reaction gets triggered by a reply, then maubot will also react/reply to the original message instead of the message that triggered it. It would also not work great with edited messages. The updated version fixes both of those issues.

If extensible events are coming along shortly, all these schemes will need some updates.